LINBUS Master Device Grouping for Extended Slave Connectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LINBUS configurations are limited to connecting with up to twenty slave devices, which is insufficient for modern automotive systems that require interconnection with a larger number of sensors and controllers, leading to increased costs and complexity when additional masters are needed.
Innovation Solution
A LINBUS communications network with a microcontroller unit containing processing circuitry and multiple groups of slave devices, allowing for extended connectivity beyond the traditional twenty-slave limit through a system that includes programmable resistor arrays and precision oscillators for stable frequency and temperature compensation, enabling connection with multiple groupings of slave devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single LINBUS master is used to connect with multiple slave devices, then device complexity is reduced, but the number of connected slave devices is limited to twenty
Solution Approach 1:
The system segments the slave devices into multiple groups (Group 0, Group 1, etc.), where each group can be independently selected and connected to the master device. This segmentation allows the single master to manage more than twenty slaves by organizing them into selectable groups, resolving the limitation while maintaining low system complexity.
Solution Approach 2:
The system dynamically switches between different slave device groups based on operational requirements. The microcontroller unit can selectively activate different groups of slave devices, enabling flexible adaptation to varying system needs without requiring multiple permanent master devices or increasing overall system complexity.
2Adaptability or versatility
If additional master devices are added to support more slave devices, then the number of slave devices increases, but system complexity and cost increase
Solution Approach 1:
The single LINBUS master device is designed with multi-functionality to handle multiple slave device groups. The microcontroller unit incorporates group selection logic and communication hardware that can dynamically switch between different slave groups, making the single master capable of performing the functions that would otherwise require multiple master devices, thereby reducing system complexity and cost.
3Reliability
If quartz crystals or ceramic resonators are used for synchronization, then communication stability is improved, but cost and device complexity increase
Solution Approach 1:
The system employs self-service synchronization where the microcontroller unit's internal processing circuitry generates and manages the timing and synchronization signals for LINBUS communication. This eliminates the need for external quartz crystals or ceramic resonators, as the system uses its own internal resources to maintain communication stability, thereby reducing device complexity and cost while preserving reliability.
Data Source
AI summary
A LINBUS communication network comprises a microcontroller unit containing processing circuitry for performing predefined digital processing functions. LINBUS communication network hardware is located within the microcontroller unit for digitally communicating with an off-chip LINBUS device for transmitting data thereto and receiving data therefrom. A plurality of LINBUS communication network interfaces selectively connects one of a plurality of groups of slave devices to the LINBUS network communications hardware.